GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: bin/pwd/pwd.c Lines: 9 38 23.7 %
Date: 2017-11-07 Branches: 6 39 15.4 %

Line Branch Exec Source
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/*	$OpenBSD: pwd.c,v 1.14 2015/10/09 01:37:06 deraadt Exp $	*/
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/*	$NetBSD: pwd.c,v 1.22 2011/08/29 14:51:19 joerg Exp $	*/
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/*
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 * Copyright (c) 1991, 1993, 1994
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/stat.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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extern char *__progname;
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static char *getcwd_logical(void);
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__dead static void usage(void);
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int
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main(int argc, char *argv[])
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{
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	int ch, lFlag = 0;
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	const char *p;
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	if (pledge("stdio rpath flock cpath wpath", NULL) == -1)
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		err(1, "pledge");
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	while ((ch = getopt(argc, argv, "LP")) != -1) {
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		switch (ch) {
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		case 'L':
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			lFlag = 1;
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			break;
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		case 'P':
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			lFlag = 0;
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			break;
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		default:
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			usage();
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		}
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	}
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	argc -= optind;
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	argv += optind;
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	if (argc != 0)
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		usage();
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	if (lFlag)
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		p = getcwd_logical();
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	else
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		p = NULL;
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	if (p == NULL)
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		p = getcwd(NULL, 0);
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	if (p == NULL)
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		err(EXIT_FAILURE, NULL);
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	puts(p);
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	exit(EXIT_SUCCESS);
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}
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static char *
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getcwd_logical(void)
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{
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	char *pwd, *p;
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	struct stat s_pwd, s_dot;
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	/* Check $PWD -- if it's right, it's fast. */
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	pwd = getenv("PWD");
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	if (pwd == NULL)
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		return NULL;
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	if (pwd[0] != '/')
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		return NULL;
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	/* check for . or .. components, including trailing ones */
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	for (p = pwd; *p != '\0'; p++)
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		if (p[0] == '/' && p[1] == '.') {
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			if (p[2] == '.')
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				p++;
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			if (p[2] == '\0' || p[2] == '/')
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				return NULL;
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		}
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	if (stat(pwd, &s_pwd) == -1 || stat(".", &s_dot) == -1)
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		return NULL;
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	if (s_pwd.st_dev != s_dot.st_dev || s_pwd.st_ino != s_dot.st_ino)
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		return NULL;
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	return pwd;
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}
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static void
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usage(void)
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{
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	fprintf(stderr, "usage: %s [-LP]\n", __progname);
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	exit(EXIT_FAILURE);
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}